I have launched an instance in openstack with centos 7 qcow2 public image.
I am able to boot it but unfortunately, the login is not working.
By default, Centos images are with user centos and no password but they are not working.
I have downloaded Centos from https://docs.openstack.org/image-guide/obtain-images.html
Any suggestion on this?
Where your no password comes from? Its the user centos yes, but the password-login of these images is completely disabled (except Cirros). You have to register an public ssh-key in your openstack-account, which is loaded in the VM by Cloud-init while creating the VM and then you have to use the ssh-key to access the VM.
But maybe I do not understand your question correctly and you mean, that you already used an ssh-key instead of a password. In this case, have you enabled the port 22 for the ssh-access in the security groups within your openstack-account? Per default all incoming port (inclusive ssh) are blocked by these rules.
Related
I am trying to integrate ubuntu docker container with FreeIPA and getting below error while installing FreeIPA-client --install
Created /etc/ipa/default.conf
New SSSD config will be created
Configured sudoers in /etc/nsswitch.conf
Configured /etc/sssd/sssd.conf
Configured /etc/krb5.conf for IPA realm BLABS.COM
trying https://vilma.com/ipa/json
Forwarding 'ping' to json server 'https://vilma.com/ipa/json'
Forwarding 'ca_is_enabled' to json server 'https://vilma.com/ipa/json'
Systemwide CA database updated.
Adding SSH public key from /etc/ssh/ssh_host_dsa_key.pub
Adding SSH public key from /etc/ssh/ssh_host_ed25519_key.pub
Adding SSH public key from /etc/ssh/ssh_host_ecdsa_key.pub
Adding SSH public key from /etc/ssh/ssh_host_rsa_key.pub
Forwarding 'host_mod' to json server 'https://vilma/ipa/json'
SSSD enabled
SSSD service restart was unsuccessful.
Configured /etc/openldap/ldap.conf
Unable to find 'admin' user with 'getent passwd admin#vilma.com'!
Unable to reliably detect configuration. Check NSS setup manually.
NTP enabled
I tried to start sssd manually by typing sssd and getting below message
ldb: unable to open modules directory '/usr/lib/x86_64-linux-gnu/ldb/modules/ldb' - Permission denied
(Sun Oct 14 20:55:17:078716 2018) [sssd] [load_configuration] (0x0010): The confdb initialization failed
(Sun Oct 14 20:55:17:078750 2018) [sssd] [main] (0x0020): SSSD couldn't load the configuration database.
I appreciate your help
In case anyone else runs into this, the problem is that the overlayfs that docker uses causes problems with the ldb database that sssd is using.
So you need to:
move /usr/lib/x86_64-linux-gnu/ldb/modules/ldb to another path (e.g. /usr/lib/x86_64-linux-gnu/ldb/modules/ldb-orig) in your Dockerfile
then, before starting sssd in your container, you have to create an empty volume and mount it into /usr/lib/x86_64-linux-gnu/ldb/modules/ldb
then copy the original contents of /usr/lib/x86_64-linux-gnu/ldb/modules/ldb from /usr/lib/x86_64-linux-gnu/ldb/modules/ldb-orig into the new volume
then start sssd
This seems to be fixed with Linux 5.8. I think it was this fix, but I'm not sure.
I could able to manage workaround by not using sssd (--no-sssd option)
I installed successfully ddev for TYPO3 and now want to connect to the mariadb database. But what are the credentials? If I ssh into the container and want to connect I got a password prompt.
Access via external tools is described in Using Developer Tools with ddev.
Specifically you need to execute the following command to get the necessary credentials:
ddev describe
When upgrading my ddev and deleting all the containers, everything stayed the same except my new port number incremented up by one.
mariadb
Host: localhost:portNumberIncrementedByOne
User/Pass: 'db/db'
I am running Centos 7 x86-64. I installed a guest (again Centos 7) through kickstart as an exercise. I prepared my kickstart file, I validated it and I launched with virt-install.
If something went wrong with the network configuration (During install I got no problem, I created a local repo on Host FTP server as source for the install) how can I connect to the machine?
Only SSH or virsh foresee some other connection method?
How can I find my machine running network configuration from outside?
I am running a barebone Centos7 installation so only command line, no graphical interface at all.
Thanks,
M.
You can ssh to your physical host from another one having graphical interface with X forwarding enabled (ssh -X machinename), and look at the the VM with virt-manager
You will need X running on the machine you're connecting from. For Mac OS it's XQuartz
I am trying to connect to a remote system which has CentOS running on it from a Windows machine. I am getting the following error:
My remote computer is on and is available on the network. I tried following the steps mentioned on this website http://www.techotopia.com/index.php/Remote_Access_to_the_CentOS_6_Desktop to enable remote access on centos as well.
Currently I can access the remote sever through commandline utility like Putty only.
I use VNC for remote GUI admin work on CentOS device's from windows its nice and easy to set up and use, below are links to CentOS 6.5 set up guide and 7
https://www.howtoforge.com/vnc-server-installation-centos-6.5
https://www.howtoforge.com/vnc-server-installation-on-centos-7
Let me know how you get on :)
As posted by PaulM, I followed the steps in the website to install VNCServer on the centos machine.
To connect from my linux machine, I wrote the following commands:
vncviewer
IPAddress:5901
Adding the port number specifically made it work
CentOs to centOs Only
No Need Any Softwares Already Centos have TigerVnc Viewer
1.Enable Remote desktop in your centos system
Goto System-->Preference-->Remote Desktop
**i.Enable allow other user to view your Desktop**
**ii.Enable allow other user to control your Desktop**
**iii.You must confirm each access to this machine allow or cancel**
**iv.if you ask any password to enable and type your password**
Notification Area:
Some one connect your system its enable to shows the icon on top panel.
I want a easy way to save, copy and edit files on a remote server. I'm using Eclipse as an IDE, what could be better for these tasks than RSE(Remote System Exlporer) plugin for Eclipse. The thing is that I dont know how to make a connection using a public key. I have file that I downloaded from my Amazon account, *.pem. But I don't see any forms or inputs for this, when I try to connect to my remote Linux server. It is just User-id and password. I also tried to open the public key using the system's text editor and copy everything to my password field, but it didn't worked. Pls help me
this was baking my noodle for a while too. you put the keys in a folder not in the RSE config but in the whole of eclipse
check this: http://siteadmin.gforge.inria.fr/eclipse-ssh.html
Not mentioned (at least in explicitly) is the fact that RSE (and for what I've seen, Eclipse in general) only seems to work with 1024 bit keys https://bugs.eclipse.org/bugs/show_bug.cgi?id=404714
I also had issues, because my privatekey was 2048, but I added a new key to authorized hosts and then I could connect.
I added my local computer's ~/.ssh/id_rsa.pub to the remote /home/ec2-user/.ssh/authorized_keys.
Then just set the user to connect in RSE to ec2-user when connecting.
Someone asked for root login. It works too: update /root/.ssh/authorized_keys, and edit /etc/ssh/sshd_config to allow root login:
#PermitRootLogin forced-commands-only
PubkeyAuthentication yes
Then reload the sshd daemon: service sshd restart